摘要
目前,大尺度的岩土体直剪试验费时费力,有必要采用替代材料进行试验。文中基于不同粒径的材料开展堆积层的直剪试验,获取不同法向应力及不同粒径下的剪应力-剪切位移曲线,分析不同粒径材料的剪切特性。结果表明,同一粒径下,随着法向应力逐渐增大,峰值剪应力也逐渐增大,剪切位移量也逐渐增大;同一法向应力作用下,随着材料粒径的增大,峰值剪应力也逐渐增大,其抗剪强度参数逐渐增大。然而,随着粒径的增加,剪切位移-剪应力曲线逐渐呈现波动现象。研究结果可为类似材料的剪切试验提供参考。
At present,the large-scale direct shear test of rock and soil is time-consuming and laborious,so it is necessary to use alternative materials for the test.The direct shear test of the accumulation layer is carried out based on the materials with different particle sizes,and the shear stress-shear displacement curves under different normal stresses and different particle sizes are obtained,and the shear characteristics of the materials with different particle sizes are analyzed.The results show that under the same grain size,the peak shear stress and shear displacement increase with the increase of normal stress.Under the same normal stress,with the increase of material particle size,the peak shear stress gradually increases,and its shear strength parameter gradually increases.However,with the increase of the particle size,the shear displacement-shear stress curve gradually presents a wave phenomenon.The research results can provide reference for shear tests of similar materials.
作者
李远
Li Yuan(Power China Guiyang Engineering Co.Ltd.,Guiyang,Guizhou 550081)
出处
《江西建材》
2023年第4期78-79,85,共3页
Jiangxi Building Materials
关键词
直剪试验
粒径
法向应力
抗剪强度
Direct shear test
Particle size
Normal stress
Shear strength
作者简介
李远(1984-),男,贵州遵义人,本科,工程师,主要研究方向为工程地质与岩土施工。
